Opteron 144 vs Xeon 2.66

Opteron 144 vs Xeon 2.66 Performance Spectrum

Opteron 144

1 / 1

465

+4.5%

Ryzen Threadripper PRO 3955WX

Ryzen Threadripper PRO 7955WX

Ryzen Threadripper 3990X

Xeon 2.66

1 / 1

445

0.0%

Atom 230

Pentium 4 2.26

Pentium M 1.40

Mobile Pentium 4 2.66

About PassMark

PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.

Opteron 144 vs Xeon 2.66 FPS Benchmarks

Predicted gaming performance across popular games. Tested paired with GeForce RTX 5090 to isolate CPU performance.

Search any supported game below to compare 1080p FPS for both components.

Opteron 144 vs Xeon 2.66: Pros, Cons & Final Verdict

See where each CPU makes more sense in practice: gaming, heavier work, platform cost, power draw, and upgrade path.

Opteron 144

2003

Why buy it

✅Better for gaming: +8.9% higher average FPS across 50 shared CPU benchmark tests.
✅Costs $272 less on MSRP ($65 MSRP vs $337 MSRP).
✅Delivers 441.8% more PassMark for each dollar spent, at 7.2 vs 1.3 PassMark/$ ($65 MSRP vs $337 MSRP).
✅Draws 85W instead of 89W, a 4W reduction.

Trade-offs

❌Fewer obvious downsides in this matchup outside of normal market pricing swings.

Xeon 2.66

2002

Why buy it

Trade-offs

❌Worse for gaming: lower average FPS than Opteron 144 across 50 shared CPU benchmark tests.
❌Lower PassMark (445 vs 465).
❌Lower PassMark per dollar, at 1.3 vs 7.2 PassMark/$ ($337 MSRP vs $65 MSRP).

Quick Answers

So, is Opteron 144 better than Xeon 2.66?

Yes. Opteron 144 is the better all-around CPU here. It gives you a 8.9% average FPS lead across 50 shared CPU game tests in our data, 4.5% better PassMark, and the stronger long-term platform, which is enough to make it the stronger overall pick.

Which one is better for gaming?

If gaming is the priority, Opteron 144 is the better pick. According to our tests, it delivers 8.9% more average FPS across 50 shared CPU game tests.

Which one is better for streaming, content creation, and heavy multitasking?

For streaming, content creation, and heavier multitasking, Opteron 144 is the stronger fit. You are getting 4.5% better PassMark, backed by 1 cores and 1 threads.

Which one is the smarter buy today, not just the cheaper CPU?

Opteron 144 is the better buy right now. Opteron 144 comes in $272 cheaper on MSRP at $65 MSRP versus $337 MSRP, and it still gives you a 8.9% average FPS lead across 50 shared CPU game tests in our data. It is also 441.8% better value on MSRP (7.2 vs 1.3 PassMark/$), so you are getting the faster CPU without taking a value hit on paper.

Which one is more future-proof for 2026 and beyond?

Opteron 144 makes more sense long term for 2026 and beyond. You are getting a newer CPU generation (2003 vs 2002) and more multi-core headroom with 1 cores / 1 threads instead of 1/1. That extra compute headroom is more likely to matter as games, background tasks, and creator workloads get heavier.

Opteron 144 vs Xeon 2.66 Technical Specifications

Side-by-side specs, architecture details, clocks, memory, power, and platform differences.

Opteron 144

The Opteron 144 is manufactured by AMD. It was released in Junho 2003 (22 years ago). It is based on the SledgeHammer (2003−2005) architecture. It features 1 cores and 1 threads. Max frequency: 1.8 GHz. L3 cache: 0 kB. L2 cache: 1 MB. Built on 130 nm process technology. Socket: 940. Thermal design power (TDP): 85 Watt. Passmark benchmark score: 465 points. Launch price was $65.

Xeon 2.66

The Xeon 2.66 is manufactured by Intel. It was released in 2015-01-01. It is based on the Prestonia (2002) architecture. It features 1 cores and 1 threads. Max frequency: 2.66 GHz. L3 cache: 0 kB. L2 cache: 512 kB. Built on 130 nm process technology. Socket: PGA604. Thermal design power (TDP): 89 Watt. Passmark benchmark score: 445 points. Launch price was $800.

⚡

Processing Power

Both the Opteron 144 and Xeon 2.66 share an identical 1-core/1-thread configuration. Boost clocks reach 1.8 GHz on the Opteron 144 versus 2.66 GHz on the Xeon 2.66 — a 38.6% clock advantage for the Xeon 2.66. The Opteron 144 uses the SledgeHammer (2003−2005) architecture (130 nm), while the Xeon 2.66 uses Prestonia (2002) (130 nm). In PassMark, the Opteron 144 scores 465 against the Xeon 2.66's 445 — a 4.4% lead for the Opteron 144. Both processors carry 0 kB of L3 cache.

Feature	Opteron 144	Xeon 2.66
Cores / Threads	1 / 1	1 / 1
Boost Clock	1.8 GHz	2.66 GHz+48%
L3 Cache	0 kB	0 kB
L2 Cache	1 MB+100%	512 kB
Process	130 nm	130 nm
Architecture	SledgeHammer (2003−2005)	Prestonia (2002)
PassMark	465+4%	445

🧠

Memory & Platform

The Opteron 144 uses the 940 socket (PCIe 2.0), while the Xeon 2.66 uses PGA604 (PCIe 2.0) — making them incompatible on the same motherboard.

Feature	Opteron 144	Xeon 2.66
Socket	940	PGA604
PCIe Generation	PCIe 2.0	PCIe 2.0
Max RAM Speed	DDR-400	—
Max RAM Capacity	4 GB	—
RAM Channels	2	—
ECC Support	Yes	—
PCIe Lanes	0	—

🔧

Advanced Features

Virtualization: AMD-V (Opteron 144) / not specified (Xeon 2.66). Primary use case: Opteron 144 targets Server Legacy.

Feature	Opteron 144	Xeon 2.66
Integrated GPU	No	—
Unlocked	No	—
AVX-512	No	—
Virtualization	AMD-V	—
Target Use	Server Legacy	—

💰

Value Analysis

At launch, the Opteron 144 was priced at $65, while the Xeon 2.66 came in at $337. On launch pricing ($65 vs $337), Opteron 144 was $272 cheaper. In terms of value on MSRP (PassMark points per dollar), the Opteron 144 delivers 7.2 pts/$ vs 1.3 pts/$ for the Xeon 2.66 — making the Opteron 144 the 137.7% better value option.

Feature	Opteron 144	Xeon 2.66
MSRP	$65-81%	$337
Performance per Dollar	7.2+454%	1.3
Release Date	2003	2002

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